Perhaps you should try some spelling variations:
thuoc tai » nuoc tai, hoc tai, thuoc ma
hanh lam » thanh lap, hanh kem, hanh va
thuoc va » thuoc ma, thuong va, hoc va
su sach » so sach, vu sach
lam cua » nam cua, lam chat
thuc va » thuc vat, thuc dan, thuc day
ve bach » ve cach, vu bach, vi bach
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang x hoi. hieu ve bach ((((thuoc va) or (thuoc tai))) or (thuc va)) hanh lam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. hieu ve bach ((((thuoc va) OR (thuoc tai))) OR (thuc va)) hanh lam cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu ve bach ((((thuoc va) or (thuoc tai))) or (thuc va)) hanh lam cua tre*.